In this task, you're given an article and an answer. Your task is to generate the question for the answer based on the given article.

Q: Article: When a caterpillar   feeds on a tomato leaf , the plant moves rapidly to meet with a defensive response , systematically releasing " proteinase inhibitors " -- proteins that interfere   with the caterpillar's digestion -- throughout the plant , especially in the leaves .  But how does the message get from the wounded leaf to the rest of the plant ?        Most scientists believed the alarm was spread by chemical messengers until a team of researchers headed by David Weldon-- a biologist at the University of East Anglia in Norwich , England -- made a shocking discovery .  An injured leaf , the researchers found , sends an electrical signal to warn neighboring leaves of upcoming danger . It's a " terribly tiny current " driven by an electrical potential difference of only 20 millvolts   , says Weldon , who measured the voltage after electrodes were attached to the plant's surface .          " Right now , all we can say is that there is a correlation , " Weldon notes . " If you wound the plant , you'll see an electrical signal accompanied by a biochemical response . " To learn more about the reaction , Weldon's team plans to insert electrodes within the pant tissue ( rather than on the surface ) to determine what's going on at the cellular level . The findings may help explain other mysteries surrounding plants . For example , many plants start to flower in springtime , as days grow longer , but plants sense the change in the day length through their leaves , while flowers begin to bloom at the buds   .  " There must be a signal from the leaf to the growing points , " Weldon says . " So far , no one has come up with a convincing chemical mechanism . Maybe an electrical signal is involved . " 
 Answer: They cure diseases by changing chemicals

A: What is the function of the " proteinase inhibitors " in tomato plants ?
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Q: Article: * New Zealand dollars($) LANGUAGE * English, Maori and New Zealand Sign Language MONEY * ATMs are widely available, especially in larger cities and towns,credit cards accepted in hotels and restaurants VISAS * Citizens of Australia, the UK and 56 other countries don't need visas for New Zea (length-of-stay vary). MOBILE PHONES * European phones will work on NZ's network, but not most American or Japanese phones. * global roaming or a local SIM card and prepaid account. DRIVING * Drive on the left; the steering wheel is on the right side of the car(...in case you can't find it). When to Go * HIGH SEASON (DEC-FEB) Summer: busy beaches, outdoor explorations, festivals, sporting events. Big-city accommodation prices rise. High season in the ski towns is winter (Jun-Aug). * SHOULDER (ATAR APR) Prime travelling time:fine weather, short queues, kids in school,warm(ish) ocean. Long evenings supping Kiwi wines and craft beers. Spring (Sep-Nov) is shoulder season too. * LOW SEASON (MAY-AUG) Head for the Southern Alps for some brilliant southern hemisphere skiing. No crowds, good accommodation deals and a seat in any restaurant. Warm-weather beach towns might be half asleep.  _  * Auckland International Airport Airbus Express-24-hour Shuttle Bus24-hour door-to-door services Taxiaround$70; 45 minutes to the city * Wellington Airport Bus----Airport Flyer from 6 am to 9.30 pm Shuttle Bus-24-hour door-to-door services Taxi-around$30;20 minutes to the city * Christchurch Airport BusCity Flyer from 7.15 am to 9.15 pm Shuttle Bus24-hour door-to-door services Taxi-around $50;25 minutes to the city Driving Around New Zealand There are extensive bus networks and a couple of handy train lines crisscrossing New Zealand, but for the best scenery, flexibility and pure freedom it's hard to beat piling into a camper van or rent-a-car and hitting the open road. Scanning the map you might think that driving from A to B won't take long, but remember that many of the roads here are two-lane country byways, traversing hilly landscape in curves, crests and convolutions:always allow plenty of time to get wherever you're going. And who's in a hurry anyway? Slow down and see more of the country:explore little end-of-the-line towns, stop for a swiinlsurfi beer, and pack a Swiss Army knife for impromptu picnics at roadside produce stalls. 
 Answer: Arriving in NZ.

A: What is the last part but one mainly about?
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Q: Article: London is my favorite city in the world and it's a place that draws me back to it again and again.    My first trip to London at the age of 19 was my first solo trip anywhere. I found a home stay program in one of my guidebooks so I spent my first several days staying on the out streets of London near Ealing Broadway. Each morning the older lady I was staying with would come into my room and place a cup of tea by my bedside and then wake me up so I could have breakfast and start my day of sight-seeing. It was like having my own British grandmother.    On that first trip to the UK, which was three weeks long, I decided to spend a week in London and then the rest of the time in Liverpool with a pen pal of mine. Well, after traveling up to Liverpool and spending two days with him, I found we really weren't such great friends after all, so I decided to take the boat from Liverpool to Dublin and make my way to County Galway to see my family. Partly, I wanted to go to Ireland. And partly, I just wanted to get away from my pen pal and couldn't afford a whole week on my own in England, so family to the rescue!    After a great week in Galway with my  s, I went back to London for a few more days and ended up staying with some  s there I didn't even know I had.    One of the funny things about that entire trip was that every single day when I was in London it rained. The only time it didn't rain was the week I spent in Ireland. 
 Answer: By train.

A:
How did the writer travel to Dublin?
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